Wrench



C. A. STOLAKISS WRENCH,

APPLICATION FILED DEC. 14, 1920'.

Patented uly 5, 1921.

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Fifth.

if CHRISTGS A; STOLA KISS OF BOSTON, MASSACHUSETTS.

WRENCH.

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Specification of Letters Patent.

Patented sta 5, rear.

Application filed December 14, 1920. Serial No. 430,698.

To all whom it may concern:

Be it known that Crims'ros A. STOL.

Kiss, a subject of Greece, residing at,Bos-' ton, in the county of Suffolk and State of Massachusetts, have invented new a11duse ful improvements in ll renches, of which the following is a specification.

This invention relates to an improvement in pipe wrenches. c

The object of the invention is to provide a simply constructed pipe wrench whi h may be easily and quickly adjusted to fitpipes of various sizes.

The invention consists in the combination and arrangement of parts set forth in the following specification, and particularly pointed out in the claims thereof.

Referring to the drawings:

figure 1 is a side elevation of a pipe wrench embodying my invention.

Fig. 2 is a horizontal section taken on the line 22, Fig. 1.

Fig. is a detail section of the yoke taken on the line 3--3, Fig. 2, and looking in the direction of the arrows on said line.

F s is a side elevation similar to Fig. 1 with the handle broken away illustrating a modified embodiment of my invention.

Like numerals refer to like parts througlr out th several views of the drawings.

in the drawings. 5 represents a fixed aw provided with suitably formed teeth 6 adapted to engage a pipe. A shank 7 extends from the jaw 5 and terminates in a handle One side of the shank 7 is beveled at 9 and provided with teeth 10 which are adapted to engage similarly formed teeth 11 provided upon a yoke 12 which surrounds toe shank T and is also slid-able longitudinally thereon betw en a shoulder 1.3 formed by the junction of the fixed jaw 5 and the shank 7' and another shoulder 14 at the end of the beveled surface 9. The yoke 12 has side walls 15 and 16 between which the shank 7 is located, the opposite sides of said shank contacting with the inner surfaces of said walls.

A movable jaw 17 provided with suitably formed teeth 18 also adapted to engage a pipe is oppositely disposed to the fixed jaw 5. The movable jaw 17 has a shank 19 formed integral therewithwhich is pivoted to the yoke 12 at 20 between the side walls 15 and 16 thereof. The rocking movement of the movable jaw 17 in a forward direction is limited by the shank portion 7 19 thereof contacting with an edge 21 of the fixed jaw 5 and in a rearward direction bv said shank contacting with an upper corner of a rear wall 22 of the yoke 12.

A spring 23 is fastened to the shank 19 of the movable jaw 17 within a recess 2-1 at a point 25 in alinement with the pivot 20 and said spring 23 extends an equal distance on opposite sides of said point 25, the opposite end portions thereof bearing against an edge 26 of the shank 7 of the fixed jaw 5, thereby forcing the teeth 11 of the yoke 12 into engagement with the teeth 10 of the shank 7, as illustrated in Figs. 1 and 2.

The method of adjusting the wrench for various sizes of pipes is as follows: The shank 7 is grasped by the hand just below the yoke 12 with the thumb resting against the rear wall 22 of said yoke. Pressure is then applied by the thumb against the rear wall thereby compressing the spring 28 and forcing the teeth 11 of the yoke out of e11- gagement with the teeth 10 of the shank 7. lVith the respective teeth out of engagement, the yoke 12 may be slid upwardly or downwardly as desired upon the shank 7 until the desired distance intervenes between the teeth 6 and 18, after which the pressure of the thumb is removed, whereupon the spring 28 will again force the teeth 11 of the yoke into engagement with the teeth 10 upon the shank 7. The wrench may then be applied to a pipe and used in the well known manner.

In Fig. 4 a modified embodiment of my invention is illustrated in which the recess 24: which is formed in the shank 19 of the preferred embodiment is eliminated and a spring 27 is fastened at one end portion thereof to an edge of the shank 19 at a point 28, while the other end portion of the spring bears against the edge 26 of the shank 7. in this embodiment of my invention the spring 27 will hold the teeth 10 and 11 in engagement with each other and at the same time tend to force the upper portion of the shank 19 into engagement with the edge 21 of the fixed jaw 5. The wrench of this embodiment is adjusted and used in a manner similar to the device illust 'ated in Fig. 1.

1 claim:

1. A wrench having, in combination, a fixed jaw, a shank formed integral with said fixed jaw provided with a beveled surface upon one'side thereof, said beveled surface having teeth formed thereon, a yoke surrounding said shank and provided with teeth adapted to engage the teeth of said shank, a movable jaw opposed to said fixed jaw, a shank formed integral with said movable j aw pivotally mounted upon said yoke and yielding means interposed between said shanks adapted to force said teeth into engagement with each other and thereby rigidly secure said yoke upon the shank of said fixed jaw.

2. A wrench having, in combination, a fixed jaw, a shank formed integral with said fixed jaw provided with a beveled surface upon one side thereof, said beveled surface having teeth formed thereon, a yoke surrounding said shank and provided with teeth adapted to engage the teeth of said shank, a movable jaw opposed to said fixed jaw, a shank formed integral with said movable aw pivotally mounted upon said yoke and a spring interposed between said shanks and contacting with each adapted to force said teeth into engagement with each other and thereby prevent said yoke from tipping upon the shank of said fixed jaw.

3. A wrench having, in combination, a fixed aw, a shank formed integral with said fixed jaw provided with a beveled surface upon one side thereof, said beveled surface having teeth formed thereon, ayoke surrounding said shank and provided with teeth adapted to engage the teeth of said shank, a movable jaw opposed to said fixed jaw, a shank formed integral with said movable jaw pivotally mounted upon said yoke and a' spring attached intermediate its len th to the shank ofsaid movable jaw,the opposite end portions of said spring bearing against the shank of said fixed aw and thereby forcing said teeth into engagement with each other, said yoke and the shank of said fixed jaw being prevented from rocking one upon the other while said teeth are in engagement with each other.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

' CHRISTOS A. STOLAKISS.

Vitnesses: V

FRANKLIN E. Low, HAZEL F. LA Munen. 

